Abstract
A series of Yb3+/Ho3+/Cr3+ tridoped K2ErF5 microcrystals were synthesized by a facile solvothermal method for the first time. The morphology and upconversion luminescence of the K2ErF5 microcrystals were systematically studied. It was found that the red emission (654 nm) of K2ErF5 microcrystals was selectively enhanced by introducing Ho3+ ion. In order to further improve red luminescence intensity, Cr3+ ion was doped in K2ErF5 microcrystals. The red luminescence intensity reached maximum value when Cr3+ ion concentration was 7 mol%. The mechanisms of the luminescence enhancement were attributed to the synergistic effect among the energy transfer process, the improvement of the microcrystals' crystallinity and the distortion of the local crystal structure with lower symmetry when the Ho3+ and Cr3+ ions were introduced.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
